/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.zwl.filter;

import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.rpc.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@Activate(group = {CommonConstants.PROVIDER, CommonConstants.CONSUMER})
@Component
public class AsyncPostprocessFilter implements Filter, Filter.Listener {
  private static Logger logger = LoggerFactory.getLogger(AsyncPostprocessFilter.class);

  @Override
  public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
    RpcContext context = RpcContext.getContext();
    String filters = (String) context.getAttachment("filters");
    if (StringUtils.isEmpty(filters)) {
      filters = "";
    }
    filters += " async-post-process-filter";
    context.setAttachment("filters", filters);

    return invoker.invoke(invocation);
  }

  @Override
  public void onResponse(Result appResponse, Invoker<?> invoker, Invocation invocation) {
    logger.info("Filter get the value: " + appResponse.getValue());
  }

  @Override
  public void onError(Throwable t, Invoker<?> invoker, Invocation invocation) {
    logger.error("Filter get error", t);
  }
}
